LOS ANGELES, Calif. - The head of the Transportation Security Administration says his agency has officially rejected arming officers in response to a November attack at Los Angeles International Airport.

John Pistole made the comments Thursday following the opening of a "pre-check" application site for expedited screening at LAX.

The agency is conducting a review of the shooting that left one officer dead.

It will focus on changes to improve communication between the TSA and local law enforcement.

The Associated Press reported there was a delay of nearly a minute and a half before a radio call alerted officers of the shooting.

Pistole says virtually every issue is on the table, except for arming officers. He says introducing more guns is not the solution.